Delete row ('738', '20503') from daily_volatility

ticker_id 738
day 20503
implied_open 0.6413301178020567
implied_high 0.6619669780283606
implied_low 0.6365677654421404
implied_close 0.6429175685886955
historical_open 0.4714728836317101
historical_high 0.4714728836317101
historical_low 0.4714728836317101
historical_close 0.4714728836317101
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